package com.chongzi.cloud;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class code15 {
    public static void main(String[] args) {
        int[] nums={-1,0,1,2,-1,-4};
        System.out.println(threeSum(nums));
    }

    public  static  List<List<Integer>> threeSum(int[] nums) {
        ArrayList<List<Integer>> res = new ArrayList<>();
        Arrays.sort(nums);
        for (int i=0;i<nums.length;i++){
            if (nums[i]>1){
                break;
            }
            if (i>0&&nums[i]==nums[i-1]){
                continue;

            }
            int left=i+1;
            int right=nums.length-1;
            while (left<right){
                if (nums[i]+nums[left]+nums[right]==0){
                    ArrayList<Integer> list = new ArrayList<>();
                    list.add(nums[i]);
                    list.add(nums[left]);
                    list.add(nums[right]);
                    res.add(list);
                    while (left<right&&nums[left]==nums[left+1]){left++;}
                    while (left<right&&nums[right]==nums[right-1]){right--;}

                }
                if (nums[i]+nums[left]+nums[right]<0){
                    left++;
                } else {
                    right--;
                }

            }
        }
        return res;

    }
}
